Corner shelf



FIG. 1 is a top and left side perspective view of a corner shelf showing my new design in an environment of use;

FIG. 2 is a top and left side perspective view of a corner shelf showing my new design;

FIG. 3 is a bottom and right side perspective view thereof;

FIG. 4 is a front elevation view thereof;

FIG. 5 is a back side elevation view thereof;

FIG. 6 is a left side elevation view thereof;

FIG. 7 is a right side elevation view thereof;

FIG. 8 is a top plan view thereof; and,

FIG. 9 is a bottom plan view thereof.

The broken lines shown are included for the purpose of illustrating the unclaimed portions of the article and form no part of the claim. 

CLAIM The ornamental design for a corner shelf, as shown and described. 